dlsch_demodulation.c 165 KB
Newer Older
1
/*******************************************************************************
2
    OpenAirInterface
ghaddab's avatar
ghaddab committed
3
    Copyright(c) 1999 - 2014 Eurecom
4

ghaddab's avatar
ghaddab committed
5 6 7 8
    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
9 10


ghaddab's avatar
ghaddab committed
11 12 13 14
    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
15

ghaddab's avatar
ghaddab committed
16
    You should have received a copy of the GNU General Public License
17 18
    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
ghaddab's avatar
ghaddab committed
19
   see <http://www.gnu.org/licenses/>.
20 21

  Contact Information
ghaddab's avatar
ghaddab committed
22 23 24
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr
25

ghaddab's avatar
ghaddab committed
26
  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
27

28
*******************************************************************************/
29 30 31 32 33

/*! \file PHY/LTE_TRANSPORT/dlsch_demodulation.c
 * \brief Top-level routines for demodulating the PDSCH physical channel from 36-211, V8.6 2009-03
 * \author R. Knopp, F. Kaltenberger,A. Bhamri, S. Aubert
 * \date 2011
34
 DEBUG * \version 0.1
35 36 37 38 39 40 41 42 43 44
 * \company Eurecom
 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr,ankit.bhamri@eurecom.fr,sebastien.aubert@eurecom.fr
 * \note
 * \warning
 */

#include "PHY/defs.h"
#include "PHY/extern.h"
#include "defs.h"
#include "extern.h"
45
#include "PHY/sse_intrin.h"
46 47 48 49 50 51



#ifndef USER_MODE
#define NOCYGWIN_STATIC static
#else
52
#define NOCYGWIN_STATIC
53 54 55
#endif

//#define DEBUG_PHY 1
56

57 58 59
int avg[4];

// [MCS][i_mod (0,1,2) = (2,4,6)]
60 61 62 63
unsigned char offset_mumimo_llr_drange_fix=0;
/*
//original values from sebastion + same hand tuning
unsigned char offset_mumimo_llr_drange[29][3]={{8,8,8},{7,7,7},{7,7,7},{7,7,7},{6,6,6},{6,6,6},{6,6,6},{5,5,5},{4,4,4},{1,2,4}, // QPSK
64 65
{5,5,4},{5,5,5},{5,5,5},{3,3,3},{2,2,2},{2,2,2},{2,2,2}, // 16-QAM
{2,2,1},{3,3,3},{3,3,3},{3,3,1},{2,2,2},{2,2,2},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}}; //64-QAM
66
*/
67 68 69 70 71 72 73 74 75
/*
//first optimization try
unsigned char offset_mumimo_llr_drange[29][3]={{7, 8, 7},{6, 6, 7},{6, 6, 7},{6, 6, 6},{5, 6, 6},{5, 5, 6},{5, 5, 6},{4, 5, 4},{4, 3, 4},{3, 2, 2},{6, 5, 5},{5, 4, 4},{5, 5, 4},{3, 3, 2},{2, 2, 1},{2, 1, 1},{2, 2, 2},{3, 3, 3},{3, 3, 2},{3, 3, 2},{3, 2, 1},{2, 2, 2},{2, 2, 2},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0}};
*/
//second optimization try
/*
  unsigned char offset_mumimo_llr_drange[29][3]={{5, 8, 7},{4, 6, 8},{3, 6, 7},{7, 7, 6},{4, 7, 8},{4, 7, 4},{6, 6, 6},{3, 6, 6},{3, 6, 6},{1, 3, 4},{1, 1, 0},{3, 3, 2},{3, 4, 1},{4, 0, 1},{4, 2, 2},{3, 1, 2},{2, 1, 0},{2, 1, 1},{1, 0, 1},{1, 0, 1},{0, 0, 0},{1, 0, 0},{0, 0, 0},{0, 1, 0},{1, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0}};  w
*/
unsigned char offset_mumimo_llr_drange[29][3]= {{0, 6, 5},{0, 4, 5},{0, 4, 5},{0, 5, 4},{0, 5, 6},{0, 5, 3},{0, 4, 4},{0, 4, 4},{0, 3, 3},{0, 1, 2},{1, 1, 0},{1, 3, 2},{3, 4, 1},{2, 0, 0},{2, 2, 2},{1, 1, 1},{2, 1, 0},{2, 1, 1},{1, 0, 1},{1, 0, 1},{0, 0, 0},{1, 0, 0},{0, 0, 0},{0, 1, 0},{1, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0}};
76

77

78 79
extern void print_shorts(char *s,__m128i *x);

80 81 82 83
int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
             PDSCH_t type,
             unsigned char eNB_id,
             unsigned char eNB_id_i, //if this == phy_vars_ue->n_connected_eNB, we assume MU interference
gauthier's avatar
gauthier committed
84
             uint8_t subframe,
85 86 87 88
             unsigned char symbol,
             unsigned char first_symbol_flag,
             unsigned char dual_stream_flag,
             unsigned char i_mod,
89 90 91
             unsigned char harq_pid)
{

92 93 94 95 96 97
  LTE_UE_COMMON *lte_ue_common_vars  = &phy_vars_ue->lte_ue_common_vars;
  LTE_UE_PDSCH **lte_ue_pdsch_vars;
  LTE_DL_FRAME_PARMS *frame_parms    = &phy_vars_ue->lte_frame_parms;
  PHY_MEASUREMENTS *phy_measurements = &phy_vars_ue->PHY_measurements;
  LTE_UE_DLSCH_t   **dlsch_ue;

98
  unsigned char aatx,aarx;
99
  unsigned short nb_rb;
100
  int avgs, rb;
101
  LTE_DL_UE_HARQ_t *dlsch0_harq,*dlsch1_harq = 0;
102

103 104 105 106
  switch (type) {
  case SI_PDSCH:
    lte_ue_pdsch_vars = &phy_vars_ue->lte_ue_pdsch_vars_SI[eNB_id];
    dlsch_ue          = &phy_vars_ue->dlsch_ue_SI[eNB_id];
107
    dlsch0_harq       = dlsch_ue[0]->harq_processes[harq_pid];
108
    break;
109

110 111 112
  case RA_PDSCH:
    lte_ue_pdsch_vars = &phy_vars_ue->lte_ue_pdsch_vars_ra[eNB_id];
    dlsch_ue          = &phy_vars_ue->dlsch_ue_ra[eNB_id];
113
    dlsch0_harq       = dlsch_ue[0]->harq_processes[harq_pid];
114
    break;
115

116 117 118
  case PDSCH:
    lte_ue_pdsch_vars = &phy_vars_ue->lte_ue_pdsch_vars[eNB_id];
    dlsch_ue          = phy_vars_ue->dlsch_ue[eNB_id];
119 120
    dlsch0_harq       = dlsch_ue[0]->harq_processes[harq_pid];
    dlsch1_harq       = dlsch_ue[1]->harq_processes[harq_pid];
121 122 123
    break;

  default:
124
    LOG_E(PHY,"[UE %d][FATAL] Frame %d subframe %d: Unknown PDSCH format %d\n",phy_vars_ue->frame_rx,subframe,type);
125 126 127
    return(-1);
    break;
  }
128 129


130
  if (eNB_id > 2) {
jiangx's avatar
jiangx committed
131
    LOG_W(PHY,"dlsch_demodulation.c: Illegal eNB_id %d\n",eNB_id);
132 133
    return(-1);
  }
134

135
  if (!lte_ue_common_vars) {
jiangx's avatar
jiangx committed
136
    LOG_W(PHY,"dlsch_demodulation.c: Null lte_ue_common_vars\n");
137 138 139 140
    return(-1);
  }

  if (!dlsch_ue[0]) {
jiangx's avatar
jiangx committed
141
    LOG_W(PHY,"dlsch_demodulation.c: Null dlsch_ue pointer\n");
142 143 144 145
    return(-1);
  }

  if (!lte_ue_pdsch_vars) {
jiangx's avatar
jiangx committed
146
    LOG_W(PHY,"dlsch_demodulation.c: Null lte_ue_pdsch_vars pointer\n");
147 148
    return(-1);
  }
149

150
  if (!frame_parms) {
jiangx's avatar
jiangx committed
151
    LOG_W(PHY,"dlsch_demodulation.c: Null lte_frame_parms\n");
152 153
    return(-1);
  }
154 155

  //  printf("rx_dlsch subframe %d symbol %d: eNB_id %d, eNB_id_i %d, dual_stream_flag %d\n",subframe,symbol,eNB_id,eNB_id_i,dual_stream_flag);
156 157 158 159 160
  //  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

  /*
    if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp)))
    pilots=1;
161
    else
162 163 164 165
    pilots=0;
  */

  if (frame_parms->nb_antennas_tx_eNB>1) {
166
#ifdef DEBUG_DLSCH_MOD
167
    LOG_I(PHY,"dlsch: using pmi %x (%p), rb_alloc %x\n",pmi2hex_2Ar1(dlsch0_harq->pmi_alloc),dlsch_ue[0],dlsch0_harq->rb_alloc[0]);
168 169
#endif
    nb_rb = dlsch_extract_rbs_dual(lte_ue_common_vars->rxdataF,
170 171 172 173 174 175 176 177 178 179
                                   lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                   lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
                                   lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                   dlsch0_harq->pmi_alloc,
                                   lte_ue_pdsch_vars[eNB_id]->pmi_ext,
                                   dlsch0_harq->rb_alloc,
                                   symbol,
                                   subframe,
                                   phy_vars_ue->high_speed_flag,
                                   frame_parms);
180 181 182

    if (dual_stream_flag==1) {
      if (eNB_id_i<phy_vars_ue->n_connected_eNB)
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205
        nb_rb = dlsch_extract_rbs_dual(lte_ue_common_vars->rxdataF,
                                       lte_ue_common_vars->dl_ch_estimates[eNB_id_i],
                                       lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                       lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                       dlsch0_harq->pmi_alloc,
                                       lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
                                       dlsch0_harq->rb_alloc,
                                       symbol,
                                       subframe,
                                       phy_vars_ue->high_speed_flag,
                                       frame_parms);
      else
        nb_rb = dlsch_extract_rbs_dual(lte_ue_common_vars->rxdataF,
                                       lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                       lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                       lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                       dlsch0_harq->pmi_alloc,
                                       lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
                                       dlsch0_harq->rb_alloc,
                                       symbol,
                                       subframe,
                                       phy_vars_ue->high_speed_flag,
                                       frame_parms);
206 207
    }
  } // if n_tx>1
208
  else {
209
    nb_rb = dlsch_extract_rbs_single(lte_ue_common_vars->rxdataF,
210 211 212 213 214 215 216 217 218 219 220
                                     lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                     lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
                                     lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                     dlsch0_harq->pmi_alloc,
                                     lte_ue_pdsch_vars[eNB_id]->pmi_ext,
                                     dlsch0_harq->rb_alloc,
                                     symbol,
                                     subframe,
                                     phy_vars_ue->high_speed_flag,
                                     frame_parms);

221 222
    if (dual_stream_flag==1) {
      if (eNB_id_i<phy_vars_ue->n_connected_eNB)
223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
        nb_rb = dlsch_extract_rbs_single(lte_ue_common_vars->rxdataF,
                                         lte_ue_common_vars->dl_ch_estimates[eNB_id_i],
                                         lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                         lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                         dlsch0_harq->pmi_alloc,
                                         lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
                                         dlsch0_harq->rb_alloc,
                                         symbol,
                                         subframe,
                                         phy_vars_ue->high_speed_flag,
                                         frame_parms);
      else
        nb_rb = dlsch_extract_rbs_single(lte_ue_common_vars->rxdataF,
                                         lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                         lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                         lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                         dlsch0_harq->pmi_alloc,
                                         lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
                                         dlsch0_harq->rb_alloc,
                                         symbol,
                                         subframe,
                                         phy_vars_ue->high_speed_flag,
                                         frame_parms);
246 247
    }
  } //else n_tx>1
248 249

  //  printf("nb_rb = %d, eNB_id %d\n",nb_rb,eNB_id);
250
  if (nb_rb==0) {
jiangx's avatar
jiangx committed
251
    LOG_W(PHY,"dlsch_demodulation.c: nb_rb=0\n");
252 253
    return(-1);
  }
254

knopp's avatar
 
knopp committed
255
  /*
256 257
  // DL power control: Scaling of Channel estimates for PDSCH
  dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
258 259 260 261
  frame_parms,
  dlsch_ue,
  symbol,
  nb_rb);
knopp's avatar
 
knopp committed
262
  */
263 264
  if (first_symbol_flag==1) {
    dlsch_channel_level(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
265 266 267 268
                        frame_parms,
                        avg,
                        symbol,
                        nb_rb);
269
#ifdef DEBUG_PHY
jiangx's avatar
jiangx committed
270
    LOG_D(PHY,"[DLSCH] avg[0] %d\n",avg[0]);
271
#endif
272

273 274 275 276
    // the channel gain should be the effective gain of precoding + channel
    // however lets be more conservative and set maxh = nb_tx*nb_rx*max(h_i)
    // in case of precoding we add an additional factor of two for the precoding gain
    avgs = 0;
277 278 279 280 281 282 283 284

    for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++)
      for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++)
        avgs = cmax(avgs,avg[(aatx<<1)+aarx]);

    //  avgs = cmax(avgs,avg[(aarx<<1)+aatx]);


285
    lte_ue_pdsch_vars[eNB_id]->log2_maxh = (log2_approx(avgs)/2);
286 287
    // + log2_approx(frame_parms->nb_antennas_tx_eNB-1) //-1 because log2_approx counts the number of bits
    //      + log2_approx(frame_parms->nb_antennas_rx-1);
288

289
    if ((dlsch0_harq->mimo_mode>=UNIFORM_PRECODING11) &&
290 291
        (dlsch0_harq->mimo_mode< DUALSTREAM_UNIFORM_PRECODING1) &&
        (dlsch0_harq->dl_power_off==1)) // we are in TM 6
292 293 294
      lte_ue_pdsch_vars[eNB_id]->log2_maxh++;

    // this version here applies the factor .5 also to the extra terms. however, it does not work so well as the one above
295
    /* K = Nb_rx         in TM1
296 297 298 299
       Nb_tx*Nb_rx   in TM2,4,5
       Nb_tx^2*Nb_rx in TM6 */
    /*
      K = frame_parms->nb_antennas_rx*frame_parms->nb_antennas_tx_eNB; //that also covers TM1 since Nb_tx=1
300 301 302
      if ((dlsch0_harq->mimo_mode>=UNIFORM_PRECODING11) &&
      (dlsch0_harq->mimo_mode< DUALSTREAM_UNIFORM_PRECODING1) &&
      (dlsch0_harq->dl_power_off==1)) // we are in TM 6
303 304 305 306 307 308
      K *= frame_parms->nb_antennas_tx_eNB;

      lte_ue_pdsch_vars[eNB_id]->log2_maxh = (log2_approx(K*avgs)/2);
    */

#ifdef DEBUG_PHY
jiangx's avatar
jiangx committed
309 310
    LOG_D(PHY,"[DLSCH] log2_maxh = %d (%d,%d)\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh,avg[0],avgs);
    LOG_D(PHY,"[DLSCH] mimo_mode = %d\n", dlsch0_harq->mimo_mode);
311 312
#endif
  }
313

314 315 316
  aatx = frame_parms->nb_antennas_tx_eNB;
  aarx = frame_parms->nb_antennas_rx;

317
  if (dlsch0_harq->mimo_mode<LARGE_CDD) {// SISO or ALAMOUTI
318 319

    dlsch_channel_compensation(lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
320 321 322 323 324 325 326 327 328 329 330 331
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                               lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                               (aatx>1) ? lte_ue_pdsch_vars[eNB_id]->rho : NULL,
                               frame_parms,
                               symbol,
                               first_symbol_flag,
                               get_Qm(dlsch0_harq->mcs),
                               nb_rb,
                               lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                               phy_measurements); // log2_maxh+I0_shift
332
#ifdef DEBUG_PHY
333

334
    if (symbol==5)
335
      write_output("rxF_comp_d.m","rxF_c_d",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
336

337
#endif
338 339 340

    if ((dual_stream_flag==1) &&
        (eNB_id_i<phy_vars_ue->n_connected_eNB)) {
341 342
      // get MF output for interfering stream
      dlsch_channel_compensation(lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
343 344 345 346 347 348 349 350 351 352 353 354
                                 lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                 lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                                 lte_ue_pdsch_vars[eNB_id_i]->dl_ch_magb0,
                                 lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                                 (aatx>1) ? lte_ue_pdsch_vars[eNB_id_i]->rho : NULL,
                                 frame_parms,
                                 symbol,
                                 first_symbol_flag,
                                 i_mod,
                                 nb_rb,
                                 lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                                 phy_measurements); // log2_maxh+I0_shift
355
#ifdef DEBUG_PHY
356

357
      if (symbol == 5) {
358 359
        write_output("rxF_comp_d.m","rxF_c_d",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
        write_output("rxF_comp_i.m","rxF_c_i",&lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
360
      }
361 362 363

#endif

364 365
      // compute correlation between signal and interference channels
      dlsch_dual_stream_correlation(frame_parms,
366 367 368 369 370 371
                                    symbol,
                                    nb_rb,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                                    lte_ue_pdsch_vars[eNB_id]->log2_maxh);
372
    }
373
  } else if (dlsch0_harq->mimo_mode == LARGE_CDD) { // TM3
374 375 376
    //   LOG_I(PHY,"Running PDSCH RX for TM3\n");
    if (frame_parms->nb_antennas_tx_eNB == 2) {
      if (first_symbol_flag==1) {
377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
        // effective channel of desired user is always stronger than interfering eff. channel
        dlsch_channel_level_TM3(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                frame_parms,
                                avg, symbol, nb_rb);

        //  LOG_D(PHY,"llr_offset = %d\n",offset_mumimo_llr_drange[dlsch0_harq->mcs][(dlsch1_harq->mcs>>1)-1]);
        avg[0] = log2_approx(avg[0]) - 13 + offset_mumimo_llr_drange[dlsch0_harq->mcs][(get_Qm(dlsch1_harq->mcs)>>1)-1];

        lte_ue_pdsch_vars[eNB_id]->log2_maxh = cmax(avg[0],0);
        //  printf("log2_maxh =%d\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh);
      }

      dlsch_channel_compensation_TM3(frame_parms,
                                     lte_ue_pdsch_vars[eNB_id],
                                     phy_measurements,
                                     eNB_id,
                                     symbol,
                                     get_Qm(dlsch0_harq->mcs),
                                     get_Qm(dlsch1_harq->mcs),
                                     dlsch0_harq->round,
                                     nb_rb,
                                     lte_ue_pdsch_vars[eNB_id]->log2_maxh);
399
      // compute correlation between signal and interference channels (rho12 and rho21)
400
      dlsch_dual_stream_correlation(frame_parms,
401 402 403 404 405 406
                                    symbol,
                                    nb_rb,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                    &(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[2]),
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                                    lte_ue_pdsch_vars[eNB_id]->log2_maxh);
407
      dlsch_dual_stream_correlation(frame_parms,
408 409 410 411 412 413
                                    symbol,
                                    nb_rb,
                                    &(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[2]),
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
                                    lte_ue_pdsch_vars[eNB_id]->log2_maxh);
414 415
      //printf("TM3 log2_maxh : %d\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh);

416
    } else {
417
      LOG_E(PHY, "only 2 tx antennas supported for TM3\n");
418
    }
419
  } else if (dlsch0_harq->mimo_mode<DUALSTREAM_UNIFORM_PRECODING1) { // single-layer precoding (TM5, TM6), potentially TM4 (Single-codeword)
420 421
    //    printf("Channel compensation for precoding\n");
    //    if ((dual_stream_flag==1) && (eNB_id_i==NUMBER_OF_CONNECTED_eNB_MAX)) {
422
    if ((dual_stream_flag==1) && (eNB_id_i==phy_vars_ue->n_connected_eNB)) {  // TM5 two-user
423 424 425

      // Scale the channel estimates for interfering stream

426
      dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
427 428 429 430
                          frame_parms,
                          dlsch_ue,
                          symbol,
                          nb_rb);
431 432 433

      /* compute new log2_maxh for effective channel */
      if (first_symbol_flag==1) {
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457
        // effective channel of desired user is always stronger than interfering eff. channel
        dlsch_channel_level_TM56(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext, frame_parms, lte_ue_pdsch_vars[eNB_id]->pmi_ext, avg, symbol, nb_rb);

        //    LOG_D(PHY,"llr_offset = %d\n",offset_mumimo_llr_drange[dlsch0_harq->mcs][(i_mod>>1)-1]);
        avg[0] = log2_approx(avg[0]) - 13 + offset_mumimo_llr_drange[dlsch0_harq->mcs][(i_mod>>1)-1];

        lte_ue_pdsch_vars[eNB_id]->log2_maxh = cmax(avg[0],0);
        //printf("log1_maxh =%d\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh);
      }

      dlsch_channel_compensation_TM56(lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                                      lte_ue_pdsch_vars[eNB_id]->pmi_ext,
                                      frame_parms,
                                      phy_measurements,
                                      eNB_id,
                                      symbol,
                                      get_Qm(dlsch0_harq->mcs),
                                      nb_rb,
                                      lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                                      dlsch0_harq->dl_power_off);
458 459 460 461

      // if interference source is MU interference, assume opposite precoder was used at eNB

      // calculate opposite PMI
462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
      for (rb=0; rb<nb_rb; rb++) {
        switch(lte_ue_pdsch_vars[eNB_id]->pmi_ext[rb]) {
        case 0:
          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=1;
          break;

        case 1:
          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=0;
          break;

        case 2:
          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=3;
          break;

        case 3:
          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=2;
          break;
        }

        //  if (rb==0)
        //    printf("pmi %d, pmi_i %d\n",lte_ue_pdsch_vars[eNB_id]->pmi_ext[rb],lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]);

484 485
      }

486 487 488 489 490 491 492 493 494 495 496 497 498 499 500
      dlsch_channel_compensation_TM56(lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                      lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                      lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                                      lte_ue_pdsch_vars[eNB_id_i]->dl_ch_magb0,
                                      lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                                      lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
                                      frame_parms,
                                      phy_measurements,
                                      eNB_id_i,
                                      symbol,
                                      i_mod,
                                      nb_rb,
                                      lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                                      dlsch0_harq->dl_power_off);

501
#ifdef DEBUG_PHY
502

503
      if (symbol==5) {
504 505
        write_output("rxF_comp_d.m","rxF_c_d",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
        write_output("rxF_comp_i.m","rxF_c_i",&lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
506 507
      }

508 509 510 511 512 513 514 515 516
#endif

      dlsch_dual_stream_correlation(frame_parms,
                                    symbol,
                                    nb_rb,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                                    lte_ue_pdsch_vars[eNB_id]->log2_maxh);
517

518
    } else {
519
      dlsch_channel_compensation_TM56(lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
520 521 522 523 524 525 526 527 528 529 530 531 532
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                                      lte_ue_pdsch_vars[eNB_id]->pmi_ext,
                                      frame_parms,
                                      phy_measurements,
                                      eNB_id,
                                      symbol,
                                      get_Qm(dlsch0_harq->mcs),
                                      nb_rb,
                                      lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                                      1);
533 534 535 536
    }
  }

  //  printf("MRC\n");
537 538 539
  if (frame_parms->nb_antennas_rx > 1) {
    if (dlsch0_harq->mimo_mode == LARGE_CDD) {
      if (frame_parms->nb_antennas_tx_eNB == 2) {
540 541 542 543 544 545 546 547 548 549 550 551
        dlsch_detection_mrc(frame_parms,
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[dlsch0_harq->round],
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->rho,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_mag1,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_magb1,
                            symbol,
                            nb_rb,
                            dual_stream_flag);
552
      }
553 554
    } else {

555
      dlsch_detection_mrc(frame_parms,
556 557 558 559 560 561 562 563 564 565 566
                          lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                          lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                          lte_ue_pdsch_vars[eNB_id]->rho,
                          lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                          lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                          lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                          lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                          lte_ue_pdsch_vars[eNB_id_i]->dl_ch_magb0,
                          symbol,
                          nb_rb,
                          dual_stream_flag);
567 568
    }
  }
569

570 571 572 573 574 575 576 577 578 579 580 581 582 583 584
  //  printf("Combining");
  if ((dlsch0_harq->mimo_mode == SISO) ||
      ((dlsch0_harq->mimo_mode >= UNIFORM_PRECODING11) &&
       (dlsch0_harq->mimo_mode <= PUSCH_PRECODING0))) {

    /*
      dlsch_siso(frame_parms,
      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp,
      lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp,
      symbol,
      nb_rb);
    */
  } else if (dlsch0_harq->mimo_mode == ALAMOUTI) {

    dlsch_alamouti(frame_parms,
585 586 587 588 589 590
                   lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                   lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                   lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                   symbol,
                   nb_rb);

591
  }
592 593 594 595

  else if (dlsch0_harq->mimo_mode == LARGE_CDD) {

  } else {
jiangx's avatar
jiangx committed
596
    LOG_W(PHY,"dlsch_rx: Unknown MIMO mode\n");
597 598
    return (-1);
  }
599

600 601 602
  //    printf("LLR");

  switch (get_Qm(dlsch0_harq->mcs)) {
603 604
  case 2 :
    if (dlsch0_harq->mimo_mode != LARGE_CDD) {
605
      if (dual_stream_flag == 0)
606 607 608 609 610 611
        dlsch_qpsk_llr(frame_parms,
                       lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                       lte_ue_pdsch_vars[eNB_id]->llr[0],
                       symbol,first_symbol_flag,nb_rb,
                       adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                       lte_ue_pdsch_vars[eNB_id]->llr128);
612
      else if (i_mod == 2) {
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641
        dlsch_qpsk_qpsk_llr(frame_parms,
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[0],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128);
      } else if (i_mod == 4) {
        dlsch_qpsk_16qam_llr(frame_parms,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                             lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                             lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                             lte_ue_pdsch_vars[eNB_id]->llr[0],
                             symbol,first_symbol_flag,nb_rb,
                             adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                             lte_ue_pdsch_vars[eNB_id]->llr128);
      } else {
        dlsch_qpsk_64qam_llr(frame_parms,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                             lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                             lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                             lte_ue_pdsch_vars[eNB_id]->llr[0],
                             symbol,first_symbol_flag,nb_rb,
                             adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                             lte_ue_pdsch_vars[eNB_id]->llr128);

642
      }
643
    } else { // TM3
644
      DevAssert(dlsch1_harq);
645

646
      if (get_Qm(dlsch1_harq->mcs) == 2) {
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
        /*  dlsch_qpsk_llr(frame_parms,
                 lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                 lte_ue_pdsch_vars[eNB_id]->llr[0],
                 symbol,first_symbol_flag,nb_rb,
                 adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                 lte_ue_pdsch_vars[eNB_id]->llr128);
        */
        dlsch_qpsk_qpsk_llr(frame_parms,
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[dlsch0_harq->round],
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[0],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128);
        dlsch_qpsk_qpsk_llr(frame_parms,
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[dlsch0_harq->round],
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[1],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch1_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
      } else if (get_Qm(dlsch1_harq->mcs) == 4) {
        dlsch_qpsk_16qam_llr(frame_parms,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[dlsch0_harq->round],
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_mag1,
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                             lte_ue_pdsch_vars[eNB_id]->llr[0],
                             symbol,first_symbol_flag,nb_rb,
                             adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                             lte_ue_pdsch_vars[eNB_id]->llr128);
      } else {
        dlsch_qpsk_64qam_llr(frame_parms,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[dlsch0_harq->round],
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_mag1,
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                             lte_ue_pdsch_vars[eNB_id]->llr[0],
                             symbol,first_symbol_flag,nb_rb,
                             adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                             lte_ue_pdsch_vars[eNB_id]->llr128);

691 692
      }
    }
693

694
    break;
695

696 697 698
  case 4 :
    if (dual_stream_flag == 0) {
      dlsch_16qam_llr(frame_parms,
699 700 701 702 703 704 705
                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                      lte_ue_pdsch_vars[eNB_id]->llr[0],
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                      symbol,first_symbol_flag,nb_rb,
                      adjust_G2(frame_parms,dlsch0_harq->rb_alloc,4,subframe,symbol),
                      lte_ue_pdsch_vars[eNB_id]->llr128);
    } else if (i_mod == 2) {
706
      dlsch_16qam_qpsk_llr(frame_parms,
707 708 709 710 711 712 713 714 715
                           lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                           lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                           lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                           lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                           lte_ue_pdsch_vars[eNB_id]->llr[0],
                           symbol,first_symbol_flag,nb_rb,
                           adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                           lte_ue_pdsch_vars[eNB_id]->llr128);
    } else if (i_mod == 4) {
716
      dlsch_16qam_16qam_llr(frame_parms,
717 718 719 720 721 722 723 724 725
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[0],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128);
726 727
    } else {
      dlsch_16qam_64qam_llr(frame_parms,
728 729 730 731 732 733 734 735 736
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[0],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128);
737
    }
738

739
    break;
740

741 742 743
  case 6 :
    if (dual_stream_flag == 0) {
      dlsch_64qam_llr(frame_parms,
744 745 746 747 748 749 750 751
                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                      lte_ue_pdsch_vars[eNB_id]->llr[0],
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                      symbol,first_symbol_flag,nb_rb,
                      adjust_G2(frame_parms,dlsch0_harq->rb_alloc,6,subframe,symbol),
                      lte_ue_pdsch_vars[eNB_id]->llr128);
    } else if (i_mod == 2) {
752
      dlsch_64qam_qpsk_llr(frame_parms,
753 754 755 756 757 758 759 760 761
                           lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                           lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                           lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                           lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                           lte_ue_pdsch_vars[eNB_id]->llr[0],
                           symbol,first_symbol_flag,nb_rb,
                           adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                           lte_ue_pdsch_vars[eNB_id]->llr128);
    } else if (i_mod == 4) {
762
      dlsch_64qam_16qam_llr(frame_parms,
763 764 765 766 767 768 769 770 771 772 773
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[0],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128);

    } else {
774
      dlsch_64qam_64qam_llr(frame_parms,
775 776 777 778 779 780 781 782 783
                            lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                            lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext,
                            lte_ue_pdsch_vars[eNB_id]->llr[0],
                            symbol,first_symbol_flag,nb_rb,
                            adjust_G2(frame_parms,dlsch0_harq->rb_alloc,2,subframe,symbol),
                            lte_ue_pdsch_vars[eNB_id]->llr128);
784
    }
785

786
    break;
787

788
  default:
jiangx's avatar
jiangx committed
789
    LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
790
    return(-1);
791
    break;
792
  }
793

794
  return(0);
795 796 797 798 799 800 801 802 803 804 805 806 807 808
}

//==============================================================================================
// Pre-processing for LLR computation
//==============================================================================================

void dlsch_channel_compensation(int **rxdataF_ext,
                                int **dl_ch_estimates_ext,
                                int **dl_ch_mag,
                                int **dl_ch_magb,
                                int **rxdataF_comp,
                                int **rho,
                                LTE_DL_FRAME_PARMS *frame_parms,
                                unsigned char symbol,
gauthier's avatar
gauthier committed
809
                                uint8_t first_symbol_flag,
810 811 812
                                unsigned char mod_order,
                                unsigned short nb_rb,
                                unsigned char output_shift,
813 814
                                PHY_MEASUREMENTS *phy_measurements)
{
815

816 817
#if defined(__i386) || defined(__x86_64) 

818 819 820
  unsigned short rb;
  unsigned char aatx,aarx,symbol_mod,pilots=0;
  __m128i *dl_ch128,*dl_ch128_2,*dl_ch_mag128,*dl_ch_mag128b,*rxdataF128,*rxdataF_comp128,*rho128;
821
  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp128,QAM_amp128b;
822 823 824 825

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
826 827

    if (frame_parms->mode1_flag==1) // 10 out of 12 so don't reduce size
828
      nb_rb=1+(5*nb_rb/6);
829 830
    else
      pilots=1;
831 832
  }

833
  for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++) {
834 835
    if (mod_order == 4) {
      QAM_amp128 = _mm_set1_epi16(QAM16_n1);  // 2/sqrt(10)
836
      QAM_amp128b = _mm_setzero_si128();
837 838
    } else if (mod_order == 6) {
      QAM_amp128  = _mm_set1_epi16(QAM64_n1); //
839 840
      QAM_amp128b = _mm_set1_epi16(QAM64_n2);
    }
841

842 843
    //    printf("comp: rxdataF_comp %p, symbol %d\n",rxdataF_comp[0],symbol);

844
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
845 846 847 848 849 850 851 852

      dl_ch128          = (__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128      = (__m128i *)&dl_ch_mag[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128b     = (__m128i *)&dl_ch_magb[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF128        = (__m128i *)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128   = (__m128i *)&rxdataF_comp[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];


853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975
      for (rb=0; rb<nb_rb; rb++) {
        if (mod_order>2) {
          // get channel amplitude if not QPSK

          mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128[0]);
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);

          mmtmpD1 = _mm_madd_epi16(dl_ch128[1],dl_ch128[1]);
          mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);

          mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);

          // store channel magnitude here in a new field of dlsch

          dl_ch_mag128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
          dl_ch_mag128b[0] = dl_ch_mag128[0];
          dl_ch_mag128[0] = _mm_mulhi_epi16(dl_ch_mag128[0],QAM_amp128);
          dl_ch_mag128[0] = _mm_slli_epi16(dl_ch_mag128[0],1);

          dl_ch_mag128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
          dl_ch_mag128b[1] = dl_ch_mag128[1];
          dl_ch_mag128[1] = _mm_mulhi_epi16(dl_ch_mag128[1],QAM_amp128);
          dl_ch_mag128[1] = _mm_slli_epi16(dl_ch_mag128[1],1);

          if (pilots==0) {
            mmtmpD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128[2]);
            mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
            mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);

            dl_ch_mag128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);
            dl_ch_mag128b[2] = dl_ch_mag128[2];

            dl_ch_mag128[2] = _mm_mulhi_epi16(dl_ch_mag128[2],QAM_amp128);
            dl_ch_mag128[2] = _mm_slli_epi16(dl_ch_mag128[2],1);
          }

          dl_ch_mag128b[0] = _mm_mulhi_epi16(dl_ch_mag128b[0],QAM_amp128b);
          dl_ch_mag128b[0] = _mm_slli_epi16(dl_ch_mag128b[0],1);


          dl_ch_mag128b[1] = _mm_mulhi_epi16(dl_ch_mag128b[1],QAM_amp128b);
          dl_ch_mag128b[1] = _mm_slli_epi16(dl_ch_mag128b[1],1);

          if (pilots==0) {
            dl_ch_mag128b[2] = _mm_mulhi_epi16(dl_ch_mag128b[2],QAM_amp128b);
            dl_ch_mag128b[2] = _mm_slli_epi16(dl_ch_mag128b[2],1);
          }
        }

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);
        //  print_ints("re",&mmtmpD0);

        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
        //  print_ints("im",&mmtmpD1);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[0]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        //  print_ints("re(shift)",&mmtmpD0);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        //  print_ints("im(shift)",&mmtmpD1);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
        //        print_ints("c0",&mmtmpD2);
        //  print_ints("c1",&mmtmpD3);
        rxdataF_comp128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //  print_shorts("rx:",rxdataF128);
        //  print_shorts("ch:",dl_ch128);
        //  print_shorts("pack:",rxdataF_comp128);

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[1],rxdataF128[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[1]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);

        rxdataF_comp128[1] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //  print_shorts("rx:",rxdataF128+1);
        //  print_shorts("ch:",dl_ch128+1);
        //  print_shorts("pack:",rxdataF_comp128+1);

        if (pilots==0) {
          // multiply by conjugated channel
          mmtmpD0 = _mm_madd_epi16(dl_ch128[2],rxdataF128[2]);
          // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
          mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
          mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
          mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
          mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[2]);
          // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
          mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
          mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
          mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);

          rxdataF_comp128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
          //  print_shorts("rx:",rxdataF128+2);
          //  print_shorts("ch:",dl_ch128+2);
          //        print_shorts("pack:",rxdataF_comp128+2);

          dl_ch128+=3;
          dl_ch_mag128+=3;
          dl_ch_mag128b+=3;
          rxdataF128+=3;
          rxdataF_comp128+=3;
        } else { // we have a smaller PDSCH in symbols with pilots so skip last group of 4 REs and increment less
          dl_ch128+=2;
          dl_ch_mag128+=2;
          dl_ch_mag128b+=2;
          rxdataF128+=2;
          rxdataF_comp128+=2;
        }

976 977 978
      }
    }
  }
979

980
  if (rho) {
981 982 983


    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
984 985 986
      rho128        = (__m128i *)&rho[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128      = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128_2    = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055

      for (rb=0; rb<nb_rb; rb++) {
        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128_2[0]);
        //  print_ints("re",&mmtmpD0);

        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
        //  print_ints("im",&mmtmpD1);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128_2[0]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        //  print_ints("re(shift)",&mmtmpD0);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        //  print_ints("im(shift)",&mmtmpD1);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
        //        print_ints("c0",&mmtmpD2);
        //  print_ints("c1",&mmtmpD3);
        rho128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);

        //print_shorts("rx:",dl_ch128_2);
        //print_shorts("ch:",dl_ch128);
        //print_shorts("pack:",rho128);

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128_2[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128_2[1]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);


        rho128[1] =_mm_packs_epi32(mmtmpD2,mmtmpD3);
        //print_shorts("rx:",dl_ch128_2+1);
        //print_shorts("ch:",dl_ch128+1);
        //print_shorts("pack:",rho128+1);
        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128_2[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128_2[2]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);

        rho128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //print_shorts("rx:",dl_ch128_2+2);
        //print_shorts("ch:",dl_ch128+2);
        //print_shorts("pack:",rho128+2);

        dl_ch128+=3;
        dl_ch128_2+=3;
        rho128+=3;

      }

1056
      if (first_symbol_flag==1) {
1057 1058 1059
        phy_measurements->rx_correlation[0][aarx] = signal_energy(&rho[aarx][symbol*frame_parms->N_RB_DL*12],rb*12);
      }
    }
1060 1061 1062 1063
  }

  _mm_empty();
  _m_empty();
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089

#elif defined(__arm__)


    unsigned short rb;
    unsigned char aatx,aarx,symbol_mod,pilots=0;

    int16x4_t *dl_ch128,*dl_ch128_2,*rxdataF128,*rho128;
    int32x4_t mmtmpD0,mmtmpD1;
    int16x8_t *dl_ch_mag128,*dl_ch_mag128b,mmtmpD2,mmtmpD3,*rxdataF_comp128;
    int16x4_t QAM_amp128,QAM_amp128b;

    int16_t conj[4]__attribute__((aligned(16))) = {1,-1,1,-1};

    symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

    if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
        if (frame_parms->mode1_flag==1) // 10 out of 12 so don't reduce size
        { nb_rb=1+(5*nb_rb/6); }

        else
        { pilots=1; }
    }

    for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++) {
        if (mod_order == 4) {
knopp's avatar
 
knopp committed
1090 1091
            QAM_amp128  = vmov_n_s16(QAM16_n1);  // 2/sqrt(10)
            QAM_amp128b = vmov_n_s16(0);
1092 1093

        } else if (mod_order == 6) {
knopp's avatar
 
knopp committed
1094 1095
            QAM_amp128  = vmov_n_s16(QAM64_n1); //
            QAM_amp128b = vmov_n_s16(QAM64_n2);
1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
        }

        //    printf("comp: rxdataF_comp %p, symbol %d\n",rxdataF_comp[0],symbol);

        for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
           

	  
	  dl_ch128          = (int16x4_t*)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
	  dl_ch_mag128      = (int16x8_t*)&dl_ch_mag[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
	  dl_ch_mag128b     = (int16x8_t*)&dl_ch_magb[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
	  rxdataF128        = (int16x4_t*)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
	  rxdataF_comp128   = (int16x8_t*)&rxdataF_comp[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
	  
	  for (rb=0; rb<nb_rb; rb++) {
	    if (mod_order>2) {
	      // get channel amplitude if not QPSK
	      mmtmpD0 = vmull_s16(dl_ch128[0], dl_ch128[0]);
	      // mmtmpD0 = [ch0*ch0,ch1*ch1,ch2*ch2,ch3*ch3];
knopp's avatar
 
knopp committed
1115
	      mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),-output_shift);
1116 1117
	      // mmtmpD0 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3]>>output_shift on 32-bits
	      mmtmpD1 = vmull_s16(dl_ch128[1], dl_ch128[1]);
knopp's avatar
 
knopp committed
1118
	      mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),-output_shift);
1119 1120 1121
	      mmtmpD2 = vcombine_s16(vqmovn_s32(mmtmpD0),vwmovn_s32(mmtmpD1));
	      // mmtmpD2 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3,ch4*ch4 + ch5*ch5,ch4*ch4 + ch5*ch5,ch6*ch6 + ch7*ch7,ch6*ch6 + ch7*ch7]>>output_shift on 16-bits 
	      mmtmpD0 = vmull_s16(dl_ch128[2], dl_ch128[2]);
knopp's avatar
 
knopp committed
1122
	      mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),-output_shift);
1123
	      mmtmpD1 = vmull_s16(dl_ch128[3], dl_ch128[3]);
knopp's avatar
 
knopp committed
1124
	      mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),-output_shift);
1125 1126 1127
	      mmtmpD3 = vcombine_s16(vqmovn_s32(mmtmpD0),vwmovn_s32(mmtmpD1));
	      if (pilots==0) {
		mmtmpD0 = vmull_s16(dl_ch128[4], dl_ch128[4]);
knopp's avatar
 
knopp committed
1128
		mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),-output_shift);
1129
		mmtmpD1 = vmull_s16(dl_ch128[5], dl_ch128[5]);
knopp's avatar
 
knopp committed
1130
		mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),-output_shift);
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198